fetch a problem to insert values in perl programming

[arupratan biswas]

when i insert values through mysql command by html page in my table new_user then i fetch some error just like that- "you have an error in your sql syntex near ''',''>'' at line--->
$dbh = DBI->connect("dbi:mysql:test:192.168.0.95","bobby","bobby");


$sqlstatement="INSERT INTO new_user (emp_id,emp_name,emp_add,city,zip_code,dob,phone) VALUES('$emp_id','$emp_name','$emp_add','$city',$zip_code,'$dob','$phone')";
$sth = $dbh->prepare($sqlstatement);
$sth->execute ||
die "Could not execute SQL statement ... maybe invalid?";

could not exequte sql statement......maybe invalid.
please help me out from that problem.
arup ratan